Pipe coupling



June 26, 1923. HAEQKEE- 1 J. W. FRAZ|ER ET AL PIPE COUPLING Filed March5, 1921 :II HU III Patented June 26, 1923..

UNITED; STATES aunts w. 'raazmn Arno man. E. HANSEN, or crnvnmnnlomo.

PIPE COUPLING.

Application filed March 3, 1921. Serial No. 449,322.

lowing is a full, clear, and exact description,

reference being had to the accompanying drawings.

This invention relates to pipe couplings of the detachabletype and hasfor its object the provision of a simple device of this character made,of the smallest possible number of parts and easily operated by hand,but free from danger of accidental disconnection while permittin aswivelmotion of the attached parts. any swivel pipe couplings haveheretofore been made, but the same have generally been of a complicated,expensive and unwieldy construction, wherefore it is the purpose of thisinvention to provide a device of this character which shall avoid thesedefects. The special purposes forwhich this coupling is designed is theattachment of metal armored hose such as is frequently used for airunder pressure, although the same is usable in many relations in thearts with all kinds of pipes.

In the drawings accompanying and forming a part of this application.Fig. 1 is a longitudinal sectional viewthrough a simple couplingembodyin our improvements, and

Fig. 2 1s a sectlona view'corresponding to the line 2- -2 of Fig.1. L

Describing by reference characters the parts .shown in these drawings, 1represents the receiving member and 2 the entering member of the hosecoupling, the former member having an externallythreaded part 3, and thelatter having a peripheral flange 4 which is overlapped by the flangedend of an internally-threaded gland-nut 5 adapted to be screwed upon themember '1.' In the resent embodiment the interior of the memer 1 isformed with a hollow chamber 6 re: ceiving a gasket 7 into which extendsthe cylindrical central projection 8 of the memher 2; but we do notrestrict ourselves to any particular asket arran ment, nor any specificcon ormation of t e members. We

have also shown the interiors of the two members as threaded for thereception of.

members which are to be connected thereby but this also-is open to widevariation spring wire hoop seated in sai Formed in the interior of thegland-nut 5 adjacent to the flange 4.- is a circumferential I wire ring11. The inner end of the member 1 1s formedto engage this ring, as forexample by being slightly tapered as shown at 12, the parts being sodesigned that this ring will be engaged by such portion before the adacent faces of the, members 1 and 2 are brought into binding engagement.The interior diameter of the ring is less than that of the flange 4,wherefore this ring has the triple function of preventing any accidentaldisplacement of the gland-nut from the member 2 when'the parts aredisconnected, of lim ting the insertion of the member 1 into sa dgland-nut when the parts are connected and of pulling the memberslongitudmally a art when the gland'nut is unscrewed. he members aretherefore left .free to swivel while the gripping engagement of themember 1 against the ring 11 secures the gland-nut against accidentaldisconnection. 7 Y It will be understood that many-changes in detail,construction, and arrangement can be made without departing from thescope of'our invention and we limit ourselves only as s eeificallyrecited in our claims.

avmg thus described our invention what we claim is: i

1. In a pipe coupling, in combination, a pa1r of mating members, a thirdmember carried by oneof said members and adapted to receive the othermember in engaging relation, and a means inside said third memberadapted while the parts are uncoupled to prevent relative displacementbetween said third member and one of the mating members and adapted whenthe parts are coupled to prevent accidental unscrewing of said thirdmember from the other of said mating members. 2

2. In a pipe coupling, in combination, 'a pair of mating members, onehaving a peripheral 'flan and the other having an external threa a glandnut interlocked with said flange and having an internal thread adaptedto fit said first thread, the

interior of said nut also having a circumferential' groove in front ofsaid flan e, and a groove adapted both to prevent displacement o saidgland-nut relativel to said flange when the parts are uncoupedand tobecome wedged against the threaded member when the parts are coupled.

3. In a detachable coupling of the swivel type, in combination, a pairof inating mem bers, one having a chamber and the 'other a projectionextending into said chamber, one

, of said members having=an external flange,

a sleeve carried'bysaid member and having an internal flange Overlappingsaid first flange, said sleeve and the other member having interengagingprojections, and 'means carried by said sleeve and projectingi-nto theinterior thereof adapted when the parts are disconnected to preventseparation between the sleeve and the coupling member" which carries it,and also adapted when the parts are connected to engage the othercoupling member in movement-arresting relation.

, 4. In a pipe coupling of the swivel type,1

in combination, a pair of mating members, one of-which has an internalcylindrical drical, axial, projection adapted vto extend into saidchamber, a gasket located in said chamber and having'an annular groovebe-:' tween its inner end outer walls, its innerwallembracing saidprojection, one of said mem-i bers having an annular flange and theother draw said members apart when said thread ed member. is unscrewed.

In testimony whereof we hereunto aifii:

our. signatures.

- JAMES FRAZIER.

FRED. E; HANSEN;

chamber and the other of which has a eylin-

